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onsemi SMS15T1G
- Part No.:
- SMS15T1G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- SC-74, SOT-457
- Datasheet:
-
SMS15T1G.pdf
- Description:
- TVS DIODE 15VWM 29VC SC74
- Quantity:
- Payment:
- Shipping:
Inventory:20,789
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Product details
Overview
SMS15T1G from onsemi is a quad unidirectional ESD and surge protector in SC-74 package, rated for 15 V working peak reverse voltage (VRWM), 24 V clamping voltage (VC) at 12 A peak pulse current, and 350 W peak power dissipation (8 × 20 µs). It delivers Class N ESD protection (>25 kV HBM), IEC 61000-4-2 (15 kV air / 8 kV contact), and supports voltage-sensitive interfaces in portable electronics.
For engineers reviewing the SMS15T1G datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage margin versus system rail, capacitance (60–125 pF @ 0 V), IEC 61000-4-5 surge current rating (23 A), and SC-74 footprint compatibility with space-constrained USB, HDMI, and display port data lines.
Technical Context
The SMS15T1G integrates four independent unidirectional TVS diodes in a single SC-74 (Case 318F) monolithic silicon die. Each channel operates as a low-capacitance transient voltage suppressor with sharp Zener-like breakdown at 16.7–18.5 V (VBR min/max) and stable clamping up to 29 V under 12 A surge.
It meets AEC-Q101 qualification when ordered with SZ prefix (e.g., SZSMS15T1G), supports Pb-free RoHS compliance, and features UL 94 V-0 flammability rating. Thermal resistance is 556 °C/W (RJA), with junction temperature range from −55 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 15 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 16.7 V / 18.5 V - Breakdown initiates within this range at 1 mA test current |
| VC @ IPP=12 A | 29 V - Clamping voltage limits downstream IC stress during 8/20 µs surge events |
| IPP (max) | 350 W peak power - Sustains 23 A surge current per IEC 61000-4-5 (8/20 µs) |
| Capacitance @ 0 V | 60–125 pF - Low enough for USB 2.0 and HDMI 1.4 signal integrity preservation |
| ESD Rating (HBM) | >25 kV - Exceeds Class N for robust handling in assembly and field environments |
| Package | SC-74 (Case 318F) - 6-pin surface-mount footprint with 1.6 mm × 2.9 mm body size |
Pinout & Package
SC-74 package (Case 318F, Style 1) with 6-pin leaded outline and 0.95 mm pitch. Marking includes "15V" code and Pb-free "G" suffix.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Anode-referenced protection path for Channel 1 |
| 2 | Anode | Common anode connection for Channels 1 and 3 (shared node) |
| 3 | Cathode | Anode-referenced protection path for Channel 2 |
| 4 | Cathode | Anode-referenced protection path for Channel 3 |
| 5 | Anode | Common anode connection for Channels 2 and 4 (shared node) |
| 6 | Cathode | Anode-referenced protection path for Channel 4 |
Key Features
| Feature | Design Value |
|---|---|
| Quad unidirectional architecture | Four independent protection paths enable discrete routing for high-speed differential pairs (e.g., USB D+/D−, HDMI TMDS) |
| 350 W peak pulse power | Withstands 23 A IEC 61000-4-5 surge without degradation, supporting industrial-grade interface robustness |
| Low clamping voltage (29 V @ 12 A) | Maintains safe margin below 33 V logic rail tolerance, preventing latch-up in connected SoCs and PHYs |
| 60–125 pF capacitance | Preserves signal edge rate and eye diagram integrity on 480 Mbps USB 2.0 and 1.65 Gbps HDMI 1.4 links |
| AEC-Q101 qualified (SZ variant) | Validated for automotive infotainment and ADAS camera link protection where reliability and PPAP compliance are mandatory |
Applications
| USB 2.0 Interface Protection | HDMI 1.4 Data Line Protection |
|---|---|
Use Scenario: Protecting host/device USB ports against ESD events during cable insertion and hot-plug operations. IC Role / Device Role: Unidirectional TVS array clamping D+ and D− lines to ground while preserving DC bias and signal swing. Use Value: 60–125 pF capacitance avoids signal distortion; 29 V clamping ensures <3.3 V tolerant PHYs remain within safe operating area. | Use Scenario: Safeguarding HDMI source/sink TMDS channels from electrostatic discharge in consumer AV equipment. IC Role / Device Role: Four-channel TVS suppressing transients on TMDS+/- pairs and clock line without degrading 1.65 Gbps eye opening. Use Value: Low capacitance maintains impedance matching; 350 W peak power handles repeated surge exposure in retail demo units. |
| Automotive Camera Link (FPD-Link III) | Industrial Display Port Interface |
Use Scenario: ESD hardening of coaxial FPD-Link III video links between ADAS cameras and domain controllers. IC Role / Device Role: Quad unidirectional suppression on high-speed serial lanes, referenced to chassis ground via common anodes. Use Value: AEC-Q101 qualification (SZSMS15T1G) enables use in automotive grade-2 temperature environments (−40 °C to +105 °C). | Use Scenario: Transient protection for DisplayPort 1.2 main link lanes in medical imaging monitors and factory HMIs. IC Role / Device Role: Channel-isolated clamping on AUX CH, HPD, and four main link pairs using dual-anode topology. Use Value: 15 V VRWM aligns with DP 3.3 V supply rails; 24 V VC at 12 A prevents overvoltage damage to SerDes receivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD and surge protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMS12T1G | 12 V VRWM, 19 V VC @ 15 A, higher capacitance (80–150 pF) | Better suited for 12 V systems (e.g., automotive CAN FD interfaces) but less margin for 15 V rails | Select when protecting 12 V analog sensor inputs or legacy industrial buses requiring tighter clamping |
| SMS24T1G | 24 V VRWM, 44 V VC @ 8 A, lower capacitance (40–75 pF) | Optimized for 24 V industrial control I/O and PoE-powered devices with higher surge immunity needs | Choose for 24 V PLC analog modules or Ethernet PHYs where lower capacitance outweighs higher clamping voltage |
Compared with SMS12T1G and SMS24T1G, the SMS15T1G provides optimal balance for 15 V nominal systems-offering tighter clamping than SMS24T1G while maintaining lower capacitance than SMS12T1G-making it ideal for USB, HDMI, and FPD-Link III interfaces where both voltage margin and signal fidelity are critical.
Availability
SMS15T1G is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI 1.4 data line hardening, and automotive camera link (FPD-Link III) applications requiring stable component supply across production lifecycles.
Supply support for SMS15T1G includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient technologies for automotive, industrial, cloud, and IoT applications.
The SMS05T1 series-including SMS15T1G-is designed specifically for high-density, low-capacitance ESD and surge protection of high-speed digital interfaces in portable, automotive, and industrial electronics.
FAQ
What is the maximum clamping voltage of SMS15T1G under surge conditions?
The SMS15T1G exhibits a maximum clamping voltage (VC) of 29 V when subjected to a 12 A peak pulse current (8 × 20 µs waveform), as specified in the Electrical Characteristics table. This value ensures protected circuits remain within safe operating limits during transient events. The SMS15T1G's clamping performance is validated across temperature and production lots per onsemi's characterization methodology.
Does SMS15T1G support automotive-grade reliability requirements?
Yes-the SZSMS15T1G variant (with SZ prefix) is AEC-Q101 qualified and PPAP capable, meeting automotive reliability standards for temperature cycling, humidity, and surge endurance. The standard SMS15T1G is not AEC-Q101 certified; only the SZ-prefixed version carries that qualification. Engineers must specify SZSMS15T1G explicitly for automotive applications.
How does the SC-74 package of SMS15T1G affect PCB layout?
The SC-74 (Case 318F) package of SMS15T1G uses a 6-pin, 0.95 mm pitch layout with 1.6 mm × 2.9 mm body size-enabling compact placement near connectors. Its dual-common-anode pinout (Pins 2 and 5) simplifies grounding but requires careful trace routing to avoid coupling between protected channels. Thermal pad is not included; board-level copper pour aids heat dissipation.
What is the capacitance range of SMS15T1G and how does it impact high-speed signals?
SMS15T1G has a capacitance range of 60–125 pF at 0 V bias (1 MHz), measured per device unit. This low, controlled capacitance preserves signal integrity on USB 2.0 (480 Mbps) and HDMI 1.4 (1.65 Gbps) links by minimizing rise-time degradation and reflection. Layout parasitics must be minimized to prevent total channel capacitance from exceeding 150 pF.
Can SMS15T1G replace older quad TVS devices like the MMQA15VT1G?
Yes-SMS15T1G offers superior surge capability (350 W vs. ~200 W for MMQA15VT1G) and tighter clamping (29 V vs. ~33 V), while maintaining SC-74 compatibility. However, pinout differs: MMQA15VT1G uses a single common cathode, whereas SMS15T1G employs dual common anodes (Pins 2 and 5). PCB redesign is required for direct replacement; electrical validation is recommended.
SMS15T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- SC-74, SOT-457
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 29V
- Current - Peak Pulse (10/1000µs):
- 12A (8/20µs)
- Power - Peak Pulse:
- 350W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 60pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-74
SMS15T1G FAQ
1.How can I place an order for SMS15T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SMS15T1G on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMS15T1G reliable?
The price and inventory of SMS15T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMS15T1G is usually 5 days.
3.What payment methods are accepted for SMS15T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMS15T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMS15T1G?
SMS15T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMS15T1G order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMS15T1G?
For technical support, including SMS15T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMS15T1G requirements.
6.How does Aetrix verify that SMS15T1G is sourced from the original manufacturer or authorized distributors?
All SMS15T1G products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMS15T1G meets industry standards.
7.What is the process for return or replacement of SMS15T1G?
All SMS15T1G units undergo pre-shipment inspection (PSI). If there is an issue with SMS15T1G, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMS15T1G part is unused and in its original packaging.
Return procedure for SMS15T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMS15T1G Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
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